Violin is a soulful instrument, and the descendent of next week's instrument, the rhebaba. It is also called kaman, kemenja, kamanga, etc in Arabic. Sometimes Arabic musicians will play it upright, the way a rhebaba would be played.
You don't see much of the violinist in the 2nd clip, but at 2:55 the character Zou Zou (an Alma (singular of Awali,), there with her family troupe to entertain at the wedding, where it's expected they'll tease the bride and groom about the upcoming night) says "she's the kemenga (violin) and he's the oud, and together they'll make lovely music"
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